Bobbin



sept. 29, 1936.

H. SUMMA BOBBIN v Filed March '1, 1932 5 Sheets-Sheet ffy.; g3

Sept. 29, 1936.

H. SUMMA BOBBIN Filed March '7, 1952 5 Sheets-Sheet 2 Sept. 29,1936. H,SUMMA I ,2,055,952

BOBBIN Filed March 7, 1932 5 Sheets-Sheet 3 Patented Sept. 29, 1936 sa.;

UNITED STATES PATENTfoFFlC-E- .-,OBIN Hans Summa,Schwarzenbach#on-the-Saale,

j Germany Application :Maren *1, 1932, serialfNo. 597,337

- In Germany March 12, 1931 l 2 claims.; (c1: 199-297) My inventionrelates to bobbins for shuttles, and more particularly to means forconnecting the pim and the peg. x

It is an object of my invention to. provide a connection which reliablyholds 'the 'pi'rn- Von the peg even if the shuttle is moved rapidlyduring its operation but does not require an'effort for setting it. x

It is another object of 'my invention to so design the connection thatit will not causev deformation of the peg or the pirn.

It is still another object' of my invention to so design the connectionthat itV will-noty 'increase the over-all length of the peg and thepirn, and center the pirn on the peg. H -1' I D'.

It is still another object of` my` invention to 'so design theyconnection that the amount of material required for it is smalland theextra weight and the increase of inertia it brings about are negligible.l

It is still another object of my invention to so arrange the connectionthat it will notexert any mechanical or chemical,iunlrienceV on theYthread on the pirn so that breaking of thefthreads `for these causes iseliminated. i*

It is still another object of my invention to so design the connectionthat it may be tted to existing pegs and pirns, so that the same bobbinsmay be used for spinning and for weaving factories.

With these objects in mind, I provide a sleeve in the pirn and means forconnecting the sleeve to the peg.

In a preferred embodiment of my invention, I provide a bayonet joint forconnecting the pirn to the peg, the sleeve having a slot or a pair ofslots and being arranged at the big end of the pirn While the pin, orpins, of the joint are arranged in a corresponding position on the peg.

In the accompanying drawings, several embodiments of my invention areillustrated by way of example.

In the drawings Figs. 1 to 4 illustrate a pirn having a plain sleevewith a bayonet slot,

Fig. 1 is an elevation of the peg,

Fig. 2 is an elevation of the pirn,

Fig. 3 is an axial section of the pirn, and

Fig. 4 shows the pirn in section placed on the peg.

Figs. 5 and 6 illustrate a pirn having a threaded sleeve with a bayonetjoint,

Fig. 5 is a partly sectional elevation of the pirn, and

Fig. 6 is an end elevation of the from the big endof the pirn. i

Fig. '7 is an axial section of an existing pirn having means forsecuring the sleeve in Figs. 5 and 6 to it. 'f

Figs. 8 to 11 illustrate a pirn having Va. flanged Sleeve withcamwaysfor'the bayonet-joint pins, Fig. 8 is partly an elevation andpartly an-axial section-,of the pirn and the sleeve,-

' Fig. 9 is an elevation of the sleeve,

Fig. l0 is an end elevation ofthesleeve, partly `in section on the lineX-X in Fig. 9, and

Fig. 11 is a section on the une XI-XI in Fig. 1o. Referring now to thedrawings, and first to Figs. 1 to 4, I vis a peg, here shown as a double4.spring peg or Northrop skewer by Way of example. 2 is its butt, and l3is the pirn. The peg and pirn may be of any suitable and normal size andshape and the pirn maybe of layers of paper, cardboardzor the like. 4 isa sleeve which is insleeve, viewed serted in the big end of the pirn 3;5, 5 are its bayonetslots, each with a seat 6 at itsA upper end, and 1are the bayonet pins on the peg. y

'I'he'` sleeve 4 is preferably made offa stronger material than the'pirn 3,for instance, ofvLmetal.

This has the advantage that the slotsv5 willnot become deformed and worneven if usedl for a long time andthe connection remains reliable. l

By arranging the sleeve 4 in the pirn 3, the perimeter of the pirnremains quite smooth so that the threads have no tendency to break, andchemical reactions of the thread with the sleeve are prevented. Thesleeve in the pirn is smaller than would be a sleeve on the pirn, and oflighter weight. Furthermore, it is much easier to secure the sleeve inthe pirn than on it. This is important for quantity production. Theinertia of the sleeve is reduced which is particularly favorable if thepirn is used for spinning.

Preferably the inside diameter of the sleeve 4 is made a little largerthan the outside diameter of the corresponding portion of the peg I sothat the peg is free to yield to centrifugal and other forces andbehaves like a flexible shaft. Irregularities in the size of the peg arealso made up for by the clearance thus provided and seizing of thesleeve on the peg is prevented as only the material of the pirn, such ascardboard etc., and not the metal sleeve, engages the peg.

The two pins 1 which are, normaly radial, are also easily assembledWithout any appreciable cost.

The peg is preferably made longer than the pirn, as best seen in Fig. 4.This not only protects the small end of the pirn but also centers thepirn on the peg. The centering is important as it facilitates theengagement of the pins I with the slots 5. It is to be observed that theradial extension of the pins 'I is such that their outer ends clear theinner wall of the pirn when the latter is moved to engage the pins withthe angular slots 5.

Referring now to Figs. 5 and 6, the sleeve 4| is serrated or threaded onits perimeter and the serrations or threads are preferably of thebuttress type so as to form a sort of hook point- T ing to the big endof the pirn 3|. This is important as it holds the sleeve against axialdisplacement on the pirn which ,might occurwhen the pirn is pulled oithe peg.

The rm hold the threaded or serrated sleeve 4| has in the pirn, maybeffurther improved by applying an adhesive to the threaded or serratedportion of the sleeve. Longitudinal grooves 9, Fig. 6, are formed in thethreaded or serrated portion. The grooves which may be of V section asshown, or of any other section, may be arranged at diametrally oppositesides of the sleeve but obviously any number and arrangement of groovesmay be provided. The adhesive is introduced through the grooves anddistributed over the serra/tions or threads of the sleeve 4|.

Referring now to Fig. 7,.this shows the adaptation of the sleeve 4I toan existing pirn 32. 0 is a fitting which may be of wood or any othersuitable material and is inserted in the pirn 32. It has an axialtapered boze to t the peg and at its big end is equipped with thethreaded or serrated sleeve 4i as shown in Fig. 5. By these means, thesame pirns may be used for spinning and weaving which is very desirablewith respect to standardization.

Obviously the fitting of a sleeve to an existing pirn is not limited toserrated or threaded sleeves.

A sleeve of particular design is illustrated in Figs. 8 to 11. Thesleeve 4 has anges and I2 at opposite ends. Its shell is slightlytapered and has camways pressed into it for the reception of the pins Ion the peg. In the example illustrated, two camways I4 are arranged atdiametrally opposite sides of the sleeve. The camways are so deep thattheir outer walls are flush with the iianges and I2. Each camway I4 hasa flared inlet I5 and a parallel seating portion I6 in which the pins 'Iengage in the nal position of the pirn on the peg. There may be anynumber of camWays, each with a flared inlet for facilitating theintroduction of the pins 1.

The flanges and I2 of the sleeve 43 form a flat and wide channel for thereception of one or more strips of paper or the like I1. The winding ofthe strip is facilitated by the iiushness of the outer walls of thecamvvays 4 with the Viianges II, |2. Pasted on the strip Il in thechannel is a hollow body I8 which also may be wound from one or morestrips of paper or the like. The body lI8 receives the pirn 33. It maybe pasted to the pirn or may be integral with it. The sleeve 43 in thismanner is inserted quite firmly in the body of the pirn without anycoercion. If desired, the strip or strips may be Vpasted on the sleeve43 between its anges but 'this is not necessary.

Preferably the bayonet joint is so arranged that it is set by turning tothe left, as shown, so that it will not work loose in the operation ofthe loom during which the pirn has a tendency to turn toward the left.

I claim:

1. A bobbin for shuttles comprising a iixed peg Yand a pirn adapted tobe placed on said peg, a metal sleeve rigidly secured to the inside ofsaid pirn at the base thereof, so as to be totally enclosed within saidpirn, a thread of the buttress type on said sleeve for holding itagainst axial displacement in said pirn, and a bayonet joint alsoenclosed Within said pirn for detachably connecting .said peg and saidsleeve.

2. A bobbon for shuttles comprising a xed peg and a pirn adapted to beplaced on said peg, a metal sleeve rigidly secured to the inside of saidpirn at the base thereof, so as to be totally enclosed Within said pirn,said sleeve having grooves for admitting adhesive between said sleeveand said pirn, and a bayonet joint also enclosed Within said pirn fordetachably connecting said 4peg and said sleeve.

HANS SUMMA.

